
public class FDfsd {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
      System.out.println(jiecheng(5,3));
	}
	
	public static int jiecheng(int x,int y){
		if(y>0)
			return x*jiecheng(x,y-1);
		return 1;
		
	}

}
